CN114563480B - Road concrete structure strength detection device - Google Patents
Road concrete structure strength detection device Download PDFInfo
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- CN114563480B CN114563480B CN202210456912.4A CN202210456912A CN114563480B CN 114563480 B CN114563480 B CN 114563480B CN 202210456912 A CN202210456912 A CN 202210456912A CN 114563480 B CN114563480 B CN 114563480B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0232—Glass, ceramics, concrete or stone
Abstract
The invention belongs to concrete detection equipment, and discloses a device for detecting the strength of a road concrete structure, which is used for carrying out preliminary non-damage strength detection on a formed concrete structure and comprises ultrasonic detection equipment and an adjustable bracket; the ultrasonic detection equipment comprises a detection terminal and a plurality of transducers connected with the detection terminal through cables; the adjustable bracket is provided with at least two end parts with adjustable distance, and the two transducers are respectively oppositely arranged on the two end parts; and the transducers at the two end parts are attached to two parallel end surfaces of the same concrete structure for strength detection. The ultrasonic concrete strength detection device which originally needs to be operated by multiple persons is optimized to be capable of completing the detection process only by one person through the adjustable support which can be held by hands or fixed on other devices, so that the consumption of personnel is reduced, the detection efficiency is improved, and the ultrasonic concrete strength detection device is suitable for large-range concrete structural strength detection work in road engineering.
Description
Technical Field
The invention belongs to the technical field of concrete detection equipment, and particularly relates to a device for detecting the strength of a road concrete structure.
Background
In road engineering, there are a large number of concrete structures, such as supporting structures of partial bridges or tunnels, and the strength of the concrete structures is directly related to the quality of roads. Therefore, the importance of municipal road strength inspection is emphasized, and the compression resistance and load bearing capacity of the road are directly related, so that the construction effect of the project is related. Based on this, it is very important to detect and analyze the factors affecting the road strength by detecting the strength of the road concrete and to grasp the effective detection method.
In the process of detecting the strength of the road concrete, selecting a proper detection method is the key for ensuring the detection effect and is the basis for improving the detection accuracy and scientificity. Meanwhile, in addition to the detection steps before and during construction, the strength of the concrete structure of a part of roads is required to be detected due to road construction acceptance or periodic inspection of the road and bridge structure, so that the strength change condition of the formed concrete structure after setting is ensured, the strength condition of the concrete structure can be obtained in time, and potential safety hazards of the concrete structure can be analyzed.
The existing concrete strength detection mode mainly comprises three types, namely a rebound method, a sampling method and an ultrasonic method, except a mode of trial sample detection, the ultrasonic detection mode is a more common detection mode only when a formed concrete structure is detected. The method has the advantages that the method is free of damage, the strength can be detected, the defect condition of the concrete structure can be obtained, and a more accurate detection result can be obtained under the condition that the concrete structure is not damaged through effective inference.
Ultrasonic detection is mainly carried out through an ultrasonic detector, and the ultrasonic detector generally comprises two sensors which are well bonded with the surface of concrete through a coupling agent. The host sends a short pulse to the transmitting transducer causing the transmitting transducer to vibrate, producing ultrasonic waves which propagate through the concrete and are received by the receiving transducer. The host starts timing when short pulses occur to the transmitting sensor, and stops timing when the receiving sensor receives ultrasonic waves, so that the propagation time of the ultrasonic waves in the concrete is obtained. The distance between the two sensors is divided by the propagation time to obtain the propagation speed of the ultrasonic wave in the concrete, so that the strength of the concrete can be deduced. However, the detection mode generally requires multiple users to operate, and since the ultrasonic detection mode can be applied to concrete structures with different widths, the application width range is wide, and when the detection mode is operated by multiple users, the position of the detection mode needs to be positioned by multiple tools, so that the sensors at the two ends can correspondingly acquire accurate sound wave signals. And the detection environment of the road engineering structure is not fixed, so that better detection conditions cannot be provided for detection personnel in most outdoor scenes, and once the concrete structure is located at some positions inconvenient to reach, the concrete structure needs to be assisted by an auxiliary tool, and if the concrete structure is detected in a multi-person matched mode, the cost is higher, and the detection efficiency is lower.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the device for detecting the strength of the road concrete structure, which enables a single detector to complete simple strength detection on the concrete structure through an innovative structural design, and is mainly suitable for periodic detection work in project acceptance and later maintenance periods.
The technical scheme adopted by the invention is as follows:
in a first aspect, the invention discloses a device for detecting the strength of a road concrete structure, which is used for carrying out preliminary non-damage strength detection on a formed concrete structure and comprises ultrasonic detection equipment and an adjustable bracket;
the ultrasonic detection equipment comprises a detection terminal and a plurality of transducers connected with the detection terminal through cables;
the adjustable bracket is provided with at least two end parts with adjustable distance, and the two transducers are oppositely arranged on the two end parts respectively;
and the transducers at the two end parts are attached to two parallel end surfaces of the same concrete structure for strength detection.
It should be noted that the present invention is primarily directed to a concrete structure that has been formed, and is generally a part that has been fixed to form a fixed structure. And only a non-damage detection mode can be adopted for the structure, so that the structure is prevented from being influenced. The ultrasonic strength test is to apply at least two sensors to two parallel surfaces of a concrete structure, and to estimate the strength through the characteristic change of the penetrating ultrasonic wave, and generally requires at least two operators to operate the test. The adjustable support in this application has then replaced the work of one person at least, just only relies on an operating personnel to adjust the length of adjustable support to corresponding length after just can the direct operation detect.
The transducers used for testing at least comprise two transducers which are arranged oppositely on the same straight line. The transducers are connected with the detection terminal through cables, the detection terminal controls one transducer to convert an electric signal into ultrasonic waves, then the ultrasonic waves penetrate through the concrete structure, are received and converted by the other transducer, are converted into electric signals and are transmitted to the detection terminal for analysis, and due to the fact that a common calculation program is arranged in the detection terminal, corresponding compression strength values can be directly calculated through inputting sound wave data and certain field-determined parameters.
It is worth to be noted that the device is mainly used for acceptance detection or later maintenance detection of a concrete structure in road engineering, the detection precision is lower than that of a sampling detection method, but the device can save manpower due to the fact that a plurality of detection objects are provided and the detection range is large, and meanwhile, the device is applied to the primary large-range detection mode and does not need to have high detection precision. Only concrete structures with obvious defects found by the equipment are recorded, and corresponding detailed detection can be performed on objects with abnormal indexes in the preliminary detection.
With reference to the first aspect, the present disclosure discloses a first implementation manner of the first aspect, wherein the adjustable bracket includes a fixing portion and a telescopic portion, the fixing portion is provided with a handle and/or a mounting seat, and the fixing portion is connected to an external fixing structure through the mounting seat.
It is worth to be noted that, because the device of the present invention can be used for detection by a single operator, the grip and the force application are facilitated by the grip, and the adjustable support can be attached to the surface of the concrete structure and the two transducers are attached to the detection end face stably by applying the pushing force to the grip.
And simultaneously to different application scenes, can be provided with the mount pad, accessible mount pad is connected with other equipment in some scenes, then need not the manpower and support and fix.
With reference to the first embodiment of the first aspect, the invention discloses a second embodiment of the first aspect, wherein the fixing portion comprises two fixing members, a handle with a plurality of lengths is used as a middle connection structure of the two fixing members, and the length of the fixing portion is adjusted by replacing the handle.
It is worth mentioning that the handle is an alternative structure, which is arranged in the middle of the fixing part for connecting the two fixing pieces. The adjustable support not only has the pars contractilis that can directly adjust length, simultaneously in order to adapt to bigger detection width, and guarantee the structural strength of pars contractilis, realize the length adjustment on a large scale through changing the different grips of length, and the pars contractilis realizes the length fine tuning of minim scope.
With reference to the second embodiment of the first aspect, the present invention discloses a third embodiment of the first aspect, wherein the fixing member has a flat base, the base has a roller, and the fixing portion is operated to attach the roller to the adjacent and perpendicular end surface of the two end surfaces attached by the transducer during detection;
the roller is provided with a stroke detection sensor, and the rolling mileage of the roller is obtained through the stroke detection sensor.
It is worth to explain that, when detecting a concrete structure with a certain length and a constant width, a plurality of detection points need to be arranged in the length direction of the concrete structure for detection, and the whole adjustable support needs to be moved. In the existing testing method, a measuring tool is needed to mark a detection position on the surface of the concrete structure, and the moving length of the adjustable support can be detected according to the rotating angle of the roller through the roller and the stroke detection sensor. And after the first detection point is determined, the plurality of detection points are equally divided according to a plan, and then the adjustable support is moved, and the displacement distance of the adjustable support is determined from the detection terminal, so that whether the next detection point is reached or not can be determined. And because the distance requirement of this check point is not strict, mainly in order to obtain the average strength index of whole concrete structure, then directly carry out length detection efficiency through this gyro wheel and be higher, also accord with the requirement of single-man operation.
It should be noted that, since the device of the present invention is mainly applied to concrete structure detection in road engineering, and since there are many detection objects and most detection mechanisms are used by third parties, the design size of each concrete structure cannot be confirmed, and therefore, measurement needs to be performed on site during testing, and therefore, in order to save operation procedures and improve detection efficiency, the roller ranging method can be applied to the structure of the present invention.
With reference to the first embodiment of the first aspect, the present invention discloses a fourth embodiment of the first aspect, wherein the telescopic portion is a sliding structure disposed on either side or both ends of the fixing portion, and includes a horizontal sliding slot and a horizontal telescopic rod, and the horizontal telescopic rod slides in the horizontal sliding slot.
With reference to the first aspect or the first to fourth implementation manners of the first aspect, the present invention discloses a fifth implementation manner of the first aspect, wherein two ends of the adjustable support are further provided with vertical telescopic rods with adjustable heights, the energy converter is arranged at an end of the vertical telescopic rods, and the vertical telescopic rods are perpendicular to the adjustable length direction of the adjustable support.
In the above, the adjustable support is attached to the surface of the concrete structure and then moves along the length direction of the concrete structure, so as to obtain detection data of more point locations. And the movement can only cover the detection point on one straight line in the length direction of the concrete structure. The position of the energy converter on the vertical height can be adjusted through the arranged vertical telescopic rod, so that the mesh point position coverage of a local area is realized by adjusting the height back and forth on the surfaces of two sides of the concrete structure.
With reference to the first aspect or the first to fourth embodiments of the first aspect, the present disclosure discloses a sixth embodiment of the first aspect, wherein the transducer has a linear push rod, and the transducer is pushed by the linear push rod to the measured surface of the concrete structure.
In combination with the sixth implementation manner of the first aspect, the invention discloses the seventh implementation manner of the first aspect, the end of the transducer is provided with a sleeve head for containing the couplant, the sleeve head is fixed on the detection end face of the transducer and is provided with a cavity for completely covering the detection end face, and the sleeve head is connected with a pipeline for supplying the couplant externally to fill the cavity with the couplant for single detection.
With reference to the first implementation manner of the first aspect, the invention discloses an eighth implementation manner of the first aspect, and further includes a distance measurement module for detecting a distance between detection end faces of a concrete structure, where the distance measurement module includes cameras disposed at two ends of an adjustable bracket, the cameras are connected with a detection terminal for data transmission and control, a concrete structure boundary is determined according to a picture acquired by the cameras and displayed on the detection terminal, a telescopic length of the adjustable bracket is adjusted, and when physical alignment lines or electronic alignment lines on the two cameras are respectively aligned with corresponding side boundaries, the detection terminal displays a value of the distance between the detection end faces of the concrete structure calculated from the telescopic length and the fixed length.
In combination with the first implementation manner of the first aspect, the present invention discloses a ninth implementation manner of the first aspect, wherein the external fixing structure comprises a bearing system arranged on the body of the operator and a cart fixed on the fixed end surface, and a height-adjustable support rod connected with an adjustable bracket is arranged on the bearing system or the cart.
In an infinite solid medium, the propagation velocity of a longitudinal wave is related to properties such as the density, elastic modulus, and poisson's ratio of the medium. If the elastic modulus of the medium is different, the propagation speed of the acoustic wave is also different. The elastic modulus is related to the strength of the medium, so that the propagation speed of the sound wave is indirectly related to the strength of the medium, which is the basic principle of measuring the strength of concrete by an ultrasonic method.
The propagation velocity of longitudinal waves in a medium is proportional to the square root of the elastic modulus of the medium, although not a strict linear relationship, the greater the elastic modulus, the faster the propagation velocity. Along with the increase of age, the elastic modulus and the strength of the concrete are also continuously increased, and the higher the strength is, the larger the elastic modulus is, so that the propagation speed of waves is higher, and the strength of the concrete can be inferred through the wave speed. However, the increase rate of the elastic modulus of concrete is not synchronized with the increase rate of the strength of concrete with the increase of age. The elastic modulus of early concrete increases more rapidly than the strength, while later the elastic modulus increases more and more slowly, thus resulting in a highly non-linear relationship between the propagation velocity of the wave and the strength of the concrete. When the strength of the concrete is lower, the wave speed is more sensitive to the change of the strength of the concrete. Therefore, the method has a certain reference value for estimating the concrete strength through the propagation speed of the ultrasonic wave.
The beneficial effects of the invention are as follows:
(1) the ultrasonic concrete strength detection equipment which originally needs to be operated by multiple persons is optimized into the ultrasonic concrete strength detection equipment which can be operated by only one person through the adjustable bracket which can be held by hands or fixed on other equipment, so that the personnel consumption is reduced, the detection efficiency is improved, and the ultrasonic concrete strength detection equipment is suitable for large-range concrete structural strength detection work in road engineering;
(2) the invention is suitable for the joint detection of concrete structures with different widths through the adjustable bracket with telescopic length, and meanwhile, the height is adjusted through the vertical telescopic rod, and the detection is directly carried out on the marking point data on the detection terminal by assisting the roller ranging, so that the data detection of a plurality of groups of detection points can be directly completed in the measurement by one person on the concrete structure with certain length, the early-stage lineation measurement steps are reduced, and the detection efficiency is further improved;
(3) according to the invention, the linear push rod capable of automatically stretching, compressing and separating is matched with the transducer, compared with a manual compressing and fitting mode, the automatic compressing and pushing structure is suitable for concrete structure detection with a certain width, and as a concrete structure with a larger width is detected by one person, two transducers cannot be simultaneously and well compressed by two hands, the process has certain technical requirements on operators, and the success rate cannot be ensured; through the automatic pressing and fitting structure, after an operator adjusts the length of the adjustable support to enable the adjustable support to be slightly wider than the width of the concrete structure, the two linear push rods are operated to automatically press the transducer on the surface of the concrete structure during detection, and the success rate and the efficiency are high;
(4) according to the invention, through the arranged distance measuring module, a single operator can adjust the telescopic part in the horizontal direction and visually confirm that the detection point is aligned with the boundary of the concrete structure under the condition of holding by hand or fixing by other equipment, and then the extension length is added with the original fixed length to directly obtain the test interval of the concrete structure on the detection terminal, so that the step of independently detecting the interval is replaced, the distance measuring module is compatible with the whole equipment, and the detection efficiency is improved;
(5) in order to respond to different detection conditions, aiming at a part of concrete detection objects with a certain height, the remote automatic control lifting and detection are realized by matching the mounting seat of the fixing part with an external cart or a lifting mechanism, and simultaneously, all adjustable mechanisms in the scheme are replaced by electric control telescopic mechanisms, so that an operator can carry out strength detection on the concrete structure with the certain height on the ground.
Drawings
FIG. 1 is a front view of the whole detecting unit in use in embodiment 2 of the present invention;
figure 2 is a first isometric view of the entire test device of example 2 of the present invention in use;
FIG. 3 is an enlarged partial view of A of FIG. 2 according to the present invention;
FIG. 4 is a second isometric view of the entire test device of example 2 of the present invention in use;
FIG. 5 is an enlarged partial view of B of FIG. 4 according to the present invention;
FIG. 6 is a front view of the whole detecting unit in embodiment 2 of the present invention;
fig. 7 is an isometric view of the entire detecting device in embodiment 2 of the present invention.
In the figure: 1-a detection terminal, 2-a handle, 3-a horizontal telescopic rod, 4-a horizontal chute, 5-a vertical telescopic rod, 6-a linear push rod, 7-a transducer, 8-a base, 9-a connector, 10-a roller and 11-a support plate.
Detailed Description
The invention is further explained below with reference to the drawings and the specific embodiments.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or positional relationship based on that shown in the drawings or that the product of the application is used as it is, this is only for convenience of description and simplicity of description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application. Furthermore, the appearances of the terms "first," "second," and the like in the description herein are only used for distinguishing between similar elements and are not intended to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present application do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.
Example 1:
the embodiment discloses a road concrete structure intensity detection device, mainly used detects the concrete structure in the road, and is specific, to some concrete stand or concrete beam, carries out intensity detection to the structure that has built for the periodic intensity detection in acceptance inspection or the later maintenance.
Specifically, the ultrasonic detection device comprises an adjustable support with adjustable length and an ultrasonic detection module, wherein the ultrasonic detection module comprises a detection terminal 1 and a plurality of transducers 7. The detection terminal 1 is an integrated industrial tablet computer, corresponding detection software is arranged in the detection terminal 1, the detection software is the same as software of an existing ultrasonic concrete detector, the same algorithm is adopted to analyze according to echo characteristics of ultrasonic waves to deduce the compressive strength of the concrete structure, and therefore the detection terminal is recorded as a test structure of the concrete structure.
The adjustable support is a rod piece with a certain length, the rod piece is provided with a fixing part and a telescopic part, and the length is adjusted through the telescopic part.
In some embodiments, the telescopic part is a telescopic rod arranged on one side of the fixing part, the telescopic rod is provided with an operable end part for handheld pushing to adjust the length, the end part is provided with a locked rotating handle, the telescopic part which is adjusted to be in place is locked and fixed by rotating the rotating handle, the locking principle of the telescopic part is similar to that of the existing telescopic adjustable mechanism, and the telescopic part is compressed by a rod piece with threads to realize fixation.
In this embodiment, the adjustable support includes a fixed portion and two expansion portions disposed at two ends of the fixed portion, and each expansion portion has the same adjustable length range. The extending end parts of the telescopic parts at the two sides are respectively provided with a mounting end part, one transducer 7 is fixed on the mounting end part, and the sound wave generating end surfaces of the transducers 7 at the two sides are oppositely arranged.
Specifically, the mounting end is a snap ring structure, and the transducer 7 is a generally cylindrical body having a flat end surface with a circular hole in the middle thereof, so that the ultrasonic waves are directed outwardly from the hole.
The mounting end also has a rod of fixed length which has a certain extension in a direction perpendicular to the extension direction of the telescopic part, and the transducer 7 is fixed at the end of the rod so as to have a certain distance from the telescopic part.
And the side surface or the tail part of the transducer 7 is provided with a connecting terminal, and a signal wire is led out from the port of the detection terminal 1 and is connected with the connecting terminal of each transducer 7, so that the transmission of electric signals is realized.
The detection terminal 1 is provided with a large touch screen, after the power-on, the end faces of the two transducers 7 are attached and corrected, and then the transducers 7 are installed on the corresponding installation end parts, so that the detection is carried out.
During detection, the detection end face of the concrete structure is determined, and then the telescopic part is adjusted to enable the distance between the two installation end parts to be larger than the distance between the detection end faces of the concrete structure. The two mounting end parts extend into the detection end surfaces of the concrete structure, the adjustable support can be seen as being close to the surface of the concrete structure vertical to the two detection end surfaces, and an operator can hold the handle 2 arranged on the fixing part by hand to operate.
It should be noted that, when the device is used for detection, it is not necessary to perform line drawing and dot drawing in advance, and since the device is used in maintenance detection, it is only necessary to roughly count data and obtain abnormal data before performing targeted accurate detection. During testing, only the end faces of the transducers 7 are required to be aligned to any position of the detection end face, and the two transducers 7 are always in a space collinear state due to the fixation of the adjustable support, so that signals can be received.
Before detection, a certain amount of couplant is smeared on the surface of the transducer 7, and because the couplant is operated by a single person, in order to ensure that the couplant always acts on the end face of the transducer 7, a horn-shaped expansion sleeve is arranged on the detection end face of the transducer 7, and the expansion sleeve is made of soft rubber materials. Because the expansion sleeve enables the end face of the transducer 7 to be provided with a space, a certain amount of couplant is filled in the space, when the transducer 7 is tightly attached to the surface of the concrete structure, the space can be squeezed to discharge a certain amount of couplant outwards, and therefore the end face of the transducer 7 and the end face of the concrete structure are filled with the couplant.
Because the telescopic parts are in an adjustable state, after the transducers 7 are determined to be in proper positions, the operation end parts of the telescopic parts are operated to enable the two end parts to be close to the concrete structure, and when the two transducers 7 are attached to the surface of the concrete structure, the rotating handle is rotated to lock the two telescopic parts. In the state, pre-detection is firstly carried out to check whether the detection state is in the detection state, and then detection is carried out for multiple times, and numerical values are recorded for calculation. When the data detection of a single point position is finished, the two telescopic parts are released and expanded outwards to separate the two transducers 7 from the surface of the concrete structure, and then the concrete structure moves across a certain distance along the length direction of the concrete structure and then the operation is continuously repeated for recording again.
Example 2:
the embodiment also discloses a device for detecting the strength of a road concrete structure, which is optimally arranged on the basis of the embodiment 1, so that more technical effects are optimally realized.
As shown in fig. 1-7, a specific application of the device is shown. Fig. 1-5 show the state of the detection device when it is set on the concrete structure for detection, and fig. 6 and 7 show the state of the device after it is assembled.
Compared with the device in embodiment 1, the structure of the adjustable bracket is adjusted in order to better realize the convenience and operability of single-person operation.
As shown in the figure, the whole adjustable support further comprises a fixing part and two telescopic parts, wherein the fixing part comprises a handhold handle 2, and the handhold handle 2 is mainly a cylindrical rod. The fixing parts are arranged at two ends of the handle 2, the fixing parts shown in the figure are provided with a sunken base 8, one side of the base 8 is provided with a connector 9, a mounting groove is formed in the connector 9, one end of the handle 2 is inserted into the mounting groove to be clamped, and the two ends of the handle are fixedly connected through two lateral bolts.
Because the handle 2 is a replaceable structure, the handle 2 with corresponding length can be smoother according to the use requirement, so that the length of the fixing part of the whole device has a larger adjusting range, but the adjusting range is fixed, the device is mainly used for roughly adjusting the length, and the telescopic parts at two sides are of a fine adjusting structure.
The base 8 is also provided with a roller 10 structure with two wheels, and the roller 10 is fixed on the end surface of the base 8 through bolts and has the same orientation with the rod pieces on the two sides. When in use, the roller 10 is attached to the end surface of the concrete structure, and because the two groups of four wheels are attached, the roller slides in parallel along the length direction of the concrete structure.
Further, the telescopic parts on both sides of the fixing part comprise a horizontal sliding groove 4 and a horizontal telescopic rod 3 which performs reciprocating sliding on the horizontal sliding groove 4 along the length direction. The end part of the horizontal sliding groove 4 is integrally connected with the fixing part, the horizontal sliding groove 4 has a certain width, and the connection shape between the horizontal sliding groove 4 and the horizontal telescopic rod 3 is similar to a dovetail groove structure, so that the stability is better.
The end part of the horizontal telescopic rod 3 is provided with a vertical groove, the vertical groove is internally matched with a vertical telescopic rod 5, the vertical telescopic rod 5 can slide in the vertical groove, and the vertical telescopic rod has certain sliding damping and is locked by a rotating spiral structure arranged at the end part (the structure is not shown in the figure, but the structure is similar to the locking mechanism of the existing telescopic structure) the same as that of the horizontal telescopic rod 3. Erect the groove outside and be equipped with vertical extension's backup pad 11, backup pad 11 is from the outside and provides inward supporting effect for vertical telescopic link 5, because two transducers 7 of tip can be to middle extrusion, and have certain thrust during the extrusion, then provide certain supporting effect through backup pad 11 owing to longer extending structure design this moment, prevent that it from taking place great deformation and influencing structural stability.
The top end of the vertical telescopic rod 5 is provided with a plane, a linear push rod 6 is installed on the plane, a snap ring fixedly connected with the plane is arranged at the outer side end of the linear push rod 6, the transducer 7 is sleeved in the snap ring and moves in a reciprocating mode along the axial direction of the snap ring, and the tail portion of the transducer 7 is connected with the end portion of the linear push rod 6.
A collar is provided at the end of the transducer 7, which, like in embodiment 1, can form a cavity for receiving a quantity of couplant. Meanwhile, a pipeline is arranged outside the lantern ring and is connected with an external feeding mechanism through the pipeline, and the feeding mechanism is controlled by the detection terminal 1 to automatically input a certain amount of couplant into the lantern ring during fitting so as to achieve the effect of air exhaust.
Furthermore, since the distance between the two transducers 7 needs to be obtained in the ultrasonic intensity detection, the length is measured by a measuring tape in a common detection mode, and lines and points are drawn on the concrete structure to confirm the detection position.
In order to obtain the distance between the detection points, that is, the distance between the two detection end surfaces, in this embodiment, two displacement sensors are respectively disposed on the two telescopic parts. The displacement sensor is similar to a digital reading device of the existing vernier caliper, can read the extending length of the telescopic structure, and transmits the extending length to the detection terminal 1 through a cable. The length data of the corresponding fixing part is input into the detection terminal 1 before detection (the fixing part length of the fixing part is constant, and can be determined only by inputting the type or the length of the corresponding handle 2), then the end length of the telescopic part in the completely-accommodated state is also constant and is input into the detection terminal 1, and the detected end is aligned with the boundary of the concrete structure only by adjusting the telescopic part, so that the width of the whole concrete structure can be calculated through the reading of the telescopic lengths at two sides.
Further, for the convenience of single-person operation detection, a camera is arranged on the upper surface of the horizontal telescopic rod 3, the camera is in a fixed focal range, a physical scribing line is arranged on the camera, and the camera is connected with the detection terminal 1 through a cable. When distance measurement is needed, the detection terminal 1 supplies power to the camera, and a real-time picture of the camera is displayed on an interface of the detection terminal 1.
The scribe line is visible in the picture and is the standard reference for reference. Then, after the whole fixing part is fixed and the fixing part is attached to the surface of the concrete structure, an operator moves the horizontal telescopic rod 3 on any side, and looks up the camera on the corresponding side from the picture, so that the marking line in the picture of the camera is flush with the detection end surface of the concrete structure, the length of the side is fixed, then adjusts the horizontal telescopic rod 3 on the other side, looks up whether the side is aligned with the boundary according to the same standard, displays the corresponding length data on the detection terminal 1, and determines the data as the distance value between the two detection end surfaces of the concrete structure.
Preferably, the present embodiment provides another implementation manner, a linear light source is further disposed on one side of the camera of the single-side horizontal telescopic rod 3, the linear light source will emit a diffuse light source during detection, and the diffuse light source will present a pattern of a straight line or a cross line when falling on any end surface within an effective range. The camera on the side can shoot the pattern projected on the concrete structure surface in real time, and if the pattern is a straight line pattern, the straight line pattern is taken as a reference. When in detection, the linear pattern is parallel to the edge of the end face of the concrete structure, an operator refers to the linear pattern from the picture of the operation terminal, if the straight line is just attached to the edge of the end face of the concrete structure, the horizontal telescopic rod 3 is shown to be moved in place, and the telescopic amount at the moment can be used as a reference.
If the pattern of cross line, then can have the camera to gather image information and by the self-identification of testing terminal 1, because have a straight line that is perpendicular to the border and the straight line that is parallel with the border in the cross pattern, when the cross pattern moved along with horizontal telescopic link 3, the straight line that is perpendicular to the border can constantly shorten in the video image, when the length of this straight line reduces to the center that is close to the cross pattern, testing terminal 1 just judges this moment and has been the check point, just indicates the stoppable and removes. Meanwhile, in order to facilitate operation, the stretching speed can be prompted to be slowed down when the stretching speed approaches, and a roughly judged distance value is displayed on a display screen, so that an operator can judge when to stop operation.
It should be noted that the image detection and identification algorithm is a common technical means in the prior art, the detection terminal 1 is an industrial tablet computer, and the external program installation and debugging are realized by adopting an operating system with high compatibility. The camera only acquires a real-time concrete structure image, the diffusion light source adopts red light with an obvious identification effect, and the characteristic value can be accurately extracted from the acquired image to judge whether the image is attached to the edge or the length change proportion. If the system is simple, only a real-time picture needs to be fed back, and an operator can confirm the system by naked eyes according to the projected red reference line. If the concrete structure is the automatic detection system, the edge of the concrete structure can be automatically identified through modes of feature extraction and the like, the position information of the red identification mark in the image is confirmed, and whether the red identification mark is overlapped or close to the image is calculated and judged according to the relevant position information of the red identification mark and the edge.
Example 3:
the embodiment is further optimized and improved on the basis of the embodiment 2, and aims to solve the problems that many detection terrains are complex, or the height is high, so that the end face of the concrete structure is difficult to detect manually to carry out proximity detection.
Because of the detection of the road engineering concrete structure, for example, the concrete beam of some bridges or the beam structure of tunnels, complex terrains are inevitably encountered, meanwhile, in some road structures which are already in use, the assistance of construction equipment is lacked, and the cost is high due to the remote allocation of the lifting mechanism, so that the detection can not be achieved through manpower.
Specifically, in this embodiment, a lifting mechanism is provided, which includes two structures, namely a backpack type structure and a hand-push type structure.
The backpack structure comprises a backpack support and a lifting rod, the backpack support comprises straps and a fixing frame connected with the straps, and the fixing frame is of an L-shaped metal plate structure and is arranged on the front of a person. The fixed mount is provided with an installation clamping seat which is connected with the bottom of the lifting rod.
And the lifter includes a plurality of fixed pole portions and an automatic lifting pole portion that are fixed through threaded connection, and automatic lifting pole portion has certain automatic flexible function through hydraulic pressure or motor control's mode, and the power supply passes through the cable to be connected with detection terminal 1, is controlled by detection terminal 1.
An operator can carry a certain amount of fixed rod parts according to actual needs, then a plurality of fixed rod parts are spliced on the ground to form a rod part with the length smaller than the distance between the operator and the end face of the concrete structure according to the actual height of the concrete structure on the spot, the automatic lifting rod part is fixed at the end part of the automatic lifting rod part, and finally the whole lifting rod is fixed on the fixed frame and is supported by the operator in a knapsack mode.
And the fixing part of the adjustable support in embodiment 2 is provided with a mounting seat, and is connected with the end part of the automatic lifting rod part through the mounting seat, so that the whole device is supported and close to the surface of the concrete structure through the lifting rod, and finally, the telescopic length of the automatic lifting rod part is adjusted according to actual conditions, so that the roller 10 of the whole adjustable support is attached to the surface of the concrete structure.
Due to the backpack structure, in order to ensure the operability of operators, most materials of the whole device are made of light high polymer materials, wherein the fixed rod part is made of resin fibers, the using height is limited, the equipment is generally below 4m, and the prepared mass is about 10 kg.
And because operating personnel operates on the ground, have certain interval and can't reach with the concrete structure, then all adjustable structures all set up at the automatic operation structure to by detection terminal 1 direct control, and detection terminal 1 equipment can directly be placed in the mount front portion, is convenient for look over and operate. The horizontal telescopic rod 3 and the vertical telescopic rod 5 are respectively provided with a corresponding electric control telescopic mechanism, a hydraulic telescopic mechanism or a pneumatic telescopic mechanism, and the length of the concrete structure predicted by an operator is set to be the length of an appropriate adjustable support, so that the adjustable length is limited, and the telescopic mechanism with a small stroke can be used for reducing the mass.
And the sleeve head arranged at the front end of each transducer 7 is connected with a pipeline, the pipeline is connected with a feeding pump arranged outside, and the feeding pump is controlled by the detection terminal 1 to realize the control of the material injection amount of single detection.
The using sequence of the whole set of equipment is as follows: the operator assembles the whole device according to the field condition, then prepares the bearing support, fixes the strength detection device at the end part of the lifting rod, and then the lifting rod keeps a horizontal or oblique state. Then the operator holds up the whole lifting rod by hand to make the detection device close to the surface of the concrete structure, then controls the detection terminal 1 to make the roller 10 fit with the end surface of the concrete structure, adjusts the horizontal telescopic rods 3 at the two ends through the detection terminal 1 to adjust the length, and performs the length detection by the camera and the linear light source in the embodiment 2.
After the length is detected, the system changes and records the length value, and then the length of the horizontal telescopic rod 3 is adjusted to enable the transducers 7 at the two ends of the horizontal telescopic rod to be attached to the surface of the concrete structure. After the bonding is determined, the feeding pump is controlled to inject the couplant into the sleeve head and further push the transducer 7 to be close to the detection end face of the concrete structure, and at the moment, redundant couplant is discharged, so that the air in the sleeve head is completely discharged. At this moment, a single detection process is started, reading is started after the detection terminal 1 is pretested and corrected for many times, after a detection point is finished, the transducer 7 is expanded towards two sides by operation of an operator, then the whole adjustable support is moved to enable the roller 10 to move along the length direction of the surface of the attached concrete structure for a designed length, the roller 10 is provided with a stroke detection sensor, the operator can see actual rolling mileage on the detection terminal 1, then the roller is fixed for secondary detection after the roller moves to approximate mileage, and then continuous detection is carried out, so that single horizontal detection is finished.
After single horizontal detection is completed again, the length of the vertical telescopic rod 5 is adjusted at the position detected for the last time, so that the transducer 7 is fixed after rising to a certain height, horizontal detection is performed again in the reverse direction, and the mesh-shaped position detection of the concrete structure which is uniform along the length direction can be obtained after continuous detection, so that the strength condition of the whole concrete structure can be better judged.
To accommodate larger usage scenarios, the backpack system is replaced by a cart configuration having a platform for holding the lift pins and a loading space for placement of devices and other materials, such as the fixed stem portion of the lift pins. This handcart is carried to the mode that operating personnel accessible promoted, and carries out the bearing by the handcart during the use, then can the higher bigger lifter structure of adaptation, carries out the detection of higher height.
The present invention is not limited to the above-described alternative embodiments, and various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined by the appended claims, which are intended to be interpreted according to the breadth to which the description is entitled.
Claims (2)
1. The utility model provides a road concrete structure intensity detection device for carry out preliminary nothing to hinder intensity detection to fashioned concrete structure, its characterized in that: comprises ultrasonic detection equipment and an adjustable bracket;
the ultrasonic detection equipment comprises a detection terminal (1) and a plurality of transducers (7) connected with the detection terminal (1) through cables;
the adjustable support is provided with at least two end parts with adjustable distance, and two transducers (7) are oppositely arranged on the two end parts respectively;
the transducers (7) at the two end parts are attached to two parallel end surfaces of the same concrete structure for strength detection;
the adjustable support comprises a fixed part and a telescopic part, wherein the fixed part is provided with a handle (2) and/or a mounting seat, and is connected with an external fixed structure through the mounting seat;
the fixing part comprises two fixing parts, a grip (2) with a plurality of lengths is used as a middle connecting structure of the two fixing parts, and the length of the fixing part is adjusted by replacing the grip (2);
the fixing piece is provided with a flat base (8), the base (8) is provided with a roller (10), and the fixing part is operated to ensure that the roller (10) is attached to the adjacent and vertical end surface of the two end surfaces attached by the transducer (7) during detection;
a stroke detection sensor is arranged on the roller (10), and the rolling mileage of the roller (10) is acquired through the stroke detection sensor;
vertical telescopic rods (5) with adjustable heights are further arranged at two ends of the adjustable support, the energy converter (7) is arranged at the end part of each vertical telescopic rod (5), and the vertical telescopic rods (5) are perpendicular to the adjustable length direction of the adjustable support;
the transducer (7) is provided with a linear push rod (6), and the transducer (7) is pushed to the measured surface of the concrete structure by the linear push rod (6);
the end part of the transducer (7) is provided with a sleeve head for containing the couplant, the sleeve head is fixed on the detection end surface of the transducer (7) and is provided with a cavity for completely covering the detection end surface, and the sleeve head is connected with a pipeline for supplying the couplant from the outside to fill the couplant for single detection in the cavity;
the device comprises a detection terminal (1), a distance measurement module and a distance measurement module, wherein the distance measurement module comprises cameras arranged at two ends of an adjustable support, the cameras are connected with the detection terminal (1) to perform data transmission and control, concrete structure boundary determination is performed according to pictures acquired by the cameras and displayed on the detection terminal (1), the telescopic length of the adjustable support is adjusted, and when physical alignment lines or electronic alignment lines on the two cameras are respectively aligned to corresponding side boundaries, the detection terminal (1) displays the concrete structure detection end face distance value calculated by the telescopic length and the fixed length;
the external fixing structure comprises a bearing system arranged on the body of an operator and a cart fixed on the fixed end face, and a supporting rod with adjustable height connected with the adjustable support is arranged on the bearing system or the cart.
2. The apparatus for testing strength of a road concrete structure according to claim 1, wherein: the telescopic part is a sliding structure arranged on any side or two ends of the fixing part and comprises a horizontal sliding groove (4) and a horizontal telescopic rod (3), and the horizontal telescopic rod (3) slides in the horizontal sliding groove (4).
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